diff --git a/apps/cli/executables/pexable/ingest_envoy/ingest_envoy/ingestion_manifest.py b/apps/cli/executables/pexable/ingest_envoy/ingest_envoy/ingestion_manifest.py
index 282cea855b9ab1e94f1028bdda5fb196ba7eacc6..1aded5b1655cfa0dc49325dd07081316ee9320ec 100644
--- a/apps/cli/executables/pexable/ingest_envoy/ingest_envoy/ingestion_manifest.py
+++ b/apps/cli/executables/pexable/ingest_envoy/ingest_envoy/ingestion_manifest.py
@@ -203,7 +203,7 @@ class IngestionManifestBuilder:
         manifest.output_group.ancillary_products.append(artifacts_ap)
 
         manifest_file = manifest.write()
-        artifacts_file = self.staging_source_dir / self._build_artifacts_filename()
+        artifacts_file = self.staging_source_dir / artifacts_filename
         self.write_ingestion_artifacts_tar(artifacts_file)
 
         return manifest, manifest_file
diff --git a/apps/cli/executables/pexable/ingest_envoy/test/test_evla_cal_manifest.py b/apps/cli/executables/pexable/ingest_envoy/test/test_evla_cal_manifest.py
index ef74962afd429a5b4ae6c5ed6587ef63bf04cb18..81d122d0926df4a34310ed20c620402145248575 100644
--- a/apps/cli/executables/pexable/ingest_envoy/test/test_evla_cal_manifest.py
+++ b/apps/cli/executables/pexable/ingest_envoy/test/test_evla_cal_manifest.py
@@ -7,6 +7,8 @@ import sys
 from pathlib import Path
 
 # pylint: disable=E0401, E0402, R1721, W0621
+from unittest.mock import patch
+
 import pytest
 import tarfile
 
@@ -227,6 +229,31 @@ def test_output_group_well_formed():
     assert actual_json == expected_json
 
 
+def test_ingestion_artifacts_tar_filename_built_just_once(ingest_path: Path):
+    """
+    We run into trouble if manifest builder's _build_artifacts_filename()
+    is called more than once.
+
+    :param ingest_path:
+    :return:
+    """
+    populate_fake_evla_cal_ingest_path(ingest_path)
+    with patch(
+        "ingest_envoy.ingestion_manifest.IngestionManifestBuilder._build_artifacts_filename",
+        return_value="ingestion_artifacts_mine_mine_mine.tar",
+    ) as mock:
+        # build the manifest
+        IngestionManifestBuilder(
+            staging_source_dir=ingest_path,
+            sp_type=ScienceProductType.EVLA_CAL.value,
+            locator="uid://evla/calibration/are-we-there-yet",
+            telescope=Telescope.EVLA.value,
+        ).build()
+        mock.assert_called_once()
+
+    shutil.rmtree(ingest_path)
+
+
 def test_ingestion_artifacts_tar_correct(ingest_path: Path):
     """
     Do we build the correct ingestion_artifacts tar for for standard imaging ingestion?
@@ -256,6 +283,8 @@ def test_ingestion_artifacts_tar_correct(ingest_path: Path):
     mf_path = Path(member.name)
     assert mf_path.name == MANIFEST_FILENAME
 
+    shutil.rmtree(ingest_path)
+
 
 def test_evla_cal_manifest_matches_example(ingest_path: Path):
     """